When you’re the reigning world champions, you can afford to take some chances.

That’s what the Celtics [team stats] did by signing free agent forward Darius Miles yesterday. Miles, a 6-foot-9 forward, hasn’t played in the NBA for two years due to microfracture surgery on his right knee.

Terms of the deal were not announced.

"Darius has been in twice for workouts with us and has impressed us with his progress, health and attitude," Celtics director of basketball operations Danny Ainge said. "Darius will have the next couple of months to prove to myself and coach (Doc) Rivers that he can help us win."